Android device shutdown - want "ShutdownThread->shutdown()"not "su reboot -p"

Question

Several questions about shutting down a rooted android device have answers saying you should run "reboot -p" within an "su" shell. However, this answer says that reboot is quite low-and-dirty and doesn't do sufficient tidying up before pulling the plug. Instead it recommends using android.internal.app.ShutdownThread.shutdown(). Looking at the code I can see that this does a whole bunch of housekeeping stuff that I'd like to have, and it also has a handy "confirm" parameter that appears to let you shut down without asking for confirmation, which is nice.

My question is this - what properties does an app have to have in order to call ShutdownThread.shutdown()? Does is require a particular permission that can be set if the device is rooted, or does it have to be signed using the firmware key, or something else entirely?

Answer 1

Shutting down the device requires you to hold android.permission.SHUTDOWN which is only available to system applications, or applications signed with the platform certificate.